... low vibration 3.35% wind energy utilization 4. low start speed vertical wind turbine :) Feature of wind turbine1. 2 year quality ... warranty2. low noise low vibration3.35% wind energy utilization4. ... produce vertical axis and horizontal axis wind turbine including 300w, 600w , 1kw, 2kw, 3kw,5kw,10kw. The technique of other ...